Webhooks: Build vs Buy

💡 Why it matters

Every month you spend building webhook infrastructure is a month your competitors are shipping features. Fast time-to-market means faster revenue, faster feedback loops, and faster iteration.

💡 Why it matters

Webhook infrastructure looks simple (just HTTP POST, right?) but hides distributed-systems complexity: durable queues, retry logic, dead-letter handling, SSRF protection, signing, replay protection, FIFO ordering, log retention, and a self-serve portal. Each is a multi-week project.

💡 Why it matters

Webhooks are infrastructure your customers rely on daily. When they break, it's visible: missed events, out-of-order deliveries, 5xx errors. Your best engineers get pulled off core product to debug webhook issues.

💡 Why it matters

Webhook failures are customer-facing. When your webhook system goes down, your customers' integrations break. They notice. They complain. They churn.

💡 Why it matters

Webhook-specific security is a niche expertise. SSRF attacks through webhook URLs are a real threat. One misconfiguration can expose internal infrastructure.

💡 Why it matters

Your webhook consumers are developers. A poor DX means more support tickets, slower adoption, and frustrated users who switch to competitors with better webhook experiences.

💡 Why it matters

Webhook traffic is spiky. Black Friday, product launches, viral moments — your system needs to handle 10x normal load without dropping events.

💡 Why it matters

Enterprise customers won't integrate without SOC 2. EU customers need GDPR compliance. Building compliance from scratch is a 6-month detour.

💡 Why it matters

Retries sound simple until you realize you need: exponential backoff with jitter (to avoid thundering herd), dead-letter queues (for permanently failed events), deduplication (to avoid double-processing), and FIFO ordering (for sequential events).

💡 Why it matters

When a customer says "I didn't receive my webhook," you need to trace: was it sent? Did it fail? Why? How many retries? What was the response? Without observability, you're debugging blind.

💡 Why it matters

Without a self-serve portal, every webhook issue becomes a support ticket. "Can you check if my webhook was delivered?" "Can you replay these 50 events?" "Can you add a new endpoint?" — all manual work.

💡 Why it matters

One noisy customer shouldn't affect others. Multi-tenancy requires careful isolation at every layer: storage, processing, rate limiting, and monitoring.